Door latch



Oct. 4, 1932. D. w. woon 1,880,637

DOOR LATCH Filed Sept. 14, 1931 2 Sheets-Sheet l In ENT- R WlTNESS (D.00d.

. BY M Mk5,

ATTORNEYS.

' D. W. WOOD Oct. 4, 1932.

DOOR LATCH Filed Sept. 14, 1931 2 Sheets-Sheet 2 Woo T Q 1 6 N 3 W 8 .MkRAm 00 l ATTORNEYS.

Patented Oct. 4, 1932 DAVID wrnsolv woon, OF BRAZIL, INDIANA noon LATCHApplication filed September 14, 1931. Serial No. 562,774.

This invention relates to a device forlatching or bolting all kinds ofdoors and which is applicable to doors of automobiles, and which hasespecial reference to a door latch of the type disclosed in my copendingapplication filed May 26, 1931, Serial No. 540,112.

The bolt of the latch to which the present invention is applicable maybe operated both from the inside and outside of the door to which it isapplied, with the further provision that the latch bolt may vbecontrolled from the inside of the door so that the bolt cannot beoperated from the outside of the door. V

The principal object of the present invention'is the provision of asimple, reliable and eiiiectual means for retracting the latch bolt fromthe inside of the door or the like to which the latch is applied, andfor preventing means being operated from the outside of the door toretract the bolt to open the door.

lVith the foregoing and other objects in view the invention resides inthe particular provision, construction and operation of the partshereinafter fully described and illustrated in the accompanyingdrawings, in which Figure 1 is a vertical section showing the deviceapplied to a door' and its jamb, the link of the inside bolt operatingmeans being shown retained in a neutral position;

Figure 2 is a section taken on the line 22 of Figure 1;

Figure 3 is a view similar to Figure 1 but showing the bolt retracted bythe inside operating means;

Figure 4 is a view similar to Figure 1, but showing the link of theinside bolt operating means in a latching position to prevent theretraction of the bolt by the outside operating means;

Figure 5 is a detail section;

Figure 6 is a section on the line 66 of Figure 1.

In the drawings there has been shown, by way of example, an automobiledoor 10 and its jamb 11 forming part of the body of the automobile, andit being understood that the door 10 swings on a vertical axis. Thelatch assembly carried by the door 10 is received means consists of ahandle connected, with a gear OI ltS equivalent 21 which meshes with ina space or recess in the door The latch assembly includes a latch bolt12 mounted for sliding movement between. blocks 13 and 14- secured to aplate 15 which is secured to the door. The bolt 12 is retained in aretracted position by means" generallydesig nated 16, and said meanscooperates with a .cam 17 on the jamb 11 to release the bolt 12 to itslatching or bolting position as the door 10 is moved into its closedPOS11Z101L' The said means l6v is fully disclosed in the copendingapplication mentioned hereinabove,-and forms nopart of the presentinvention It is to be understood that the invention is applicable toother types of latches including a bolt movable into and out of alatching or bolting position. The bolt 12 is under the influence of aspring 18, which has one end in engagement with a: lug 19 on the plate15, and-its opposite end being dis posed in a bore in the bolt 12 andincontact therewith to move the bolt to its latching or boltingposition; v

The bolt 12 is retracted bymeansoperable from the outside of the door10. The said a gear or its equivalent 22. Gears 21 and 22 are mountedfor rotation between a flange 23 formed on the plate 15, and a plate 24.

secured to the flange 23, the plate 24; being secured to the flange 23by spacer rivets 25. o The gear 22 is mounted on a square shaft 26 whichiscau sed to rotate with the gear 22.

An arm or member 27 is secured to the shaft 26 by a set screw 28. Thearm or member 2'7 swings in response to the turning movement of theshaft 26. The said arm or member 27 cooperates with astud-or pin 29projecting laterally from the bolt 12. It will 490 now be apparent thatwhen the handle 20 is swung-downwardly or ina counterclockwisedirection, the bolt 12 will be retracted,

through the intervention of the gears 21,. and 22, the shaft 26, the arm27 and the stud 29.

Means is provided for retracting the bolt 12 from the inside of thedoor,.and also for preventing the operation 10f theoutsideboltxopgerating means to thereby maintain :theldoor locked orlatched against being opened from the outside. The said inside operatingmeans includes a handle lever 30 having secured thereto a radial arm 31pivotally connected as at 32 with one end of a rigid link 33 whoseopposite end has a slot 34 which receives a laterally projecting stud 35on the bolt 12. It will be understood that the slot 34 and stud 35provide a pivotal and slidable connection of the link 33 with the bolt12. It will now be apparent that when the handle lever 30 is swungupwardly, the bolt 12 will be retracted through the intervention of thearm 31, link 33 and stud 35, as shown most clearly in Figure 3.

In order to retain the link 33 in a neutral position, as shown in Figure1, so that the bolt 12 may be retracted by the outside operating means,there is provided means consisting of a spring 36 secured to the arm 31and extending radially with respect to the fulcrum of the handle lever30, and a spring pressed detent orball 37 carried by a plate 38 securedto the door. The spring 36 is en; gageable with the ball 37 toreleasably retain the link 33 in the neutral position, as shown inFigure 1. b

When it is desired to lock or latch the door against being opened fromthe outside by the inside operating means, the handle lever 30 is swungdownwardly from the neutral position bringing the point of pivotalconnection 32 below the fulcrum axisof the handle lever. The link 33will then be in the'path of movement of the swinging arm 27 in contactthere with, and the spring 36 will be in contact with a stop 39 on theplate 38, as shown in Figure 4:. This will prevent the bolt 12 beingretub? latter from being operated to retract said 2. In a device of theclass described, the combination of a slidable latch bolt, meansincluding a rigid swingable member to retract the bolt from the outsideof the door or the like to which the device is attached; means includinga link having endwise movement to retract the bolt from the inside ofsaid door; said link beingmovable to a position to engage said swingablemember, and means limiting the movement of the second means to hold saidlink in said position to prevent said first means from being operated toretract said bolt.

' 3. In a device of the class described, the combination of a latch boltmovable to a latching position and a retracted non-latching position, ahandle lever, a link having one end pivotally connected withsaid leverand the opposite end of said link being connected with said bolt bymeans which cause the retraction of said bolt in response to theoperation of said lever, and which allows movement of said boltrelatively to said link-to a retracted position, additional meansoperable to retract said bolt, said link being engageable with said lastmentioned means, and means limiting the movement of said lever to holdsaid link engaged with said last mentioned means to preventtheaoperationof the latter to retract the bolt.

DAVID WILSON WOOD.

tracted by the operation of the handle20'. It

will be apparentthat the arm 27 lies against the vertical flange 40 onthe bolt 15. It will therefore be apparent that with the parts in therelationship shown in Figure 4 the arm 27 cannot be swung in eitherdirection.

From the foregoing it will be apparent that the latch bolt 12 may beretracted for the purpose of opening the door from both the inside andoutside of the door by reason of the means provided; and that the doormay be locked or latched against being opened by the operation of theoutside means by setting the inside means so as to engage the arm 27.

I claim: a e

1. In a device of the class described, the combination of a slidablelatch bolt, means to retract the bolt'from the outside of the door orthe like to which the device is attached, a

rigid link, a pivotal and slidable connection between-the link and saidbolt, means to move said link in opposite directions from slink engagedwith said first means to prevent I the inside of the door, whereby thebolt may 7 lli)

